#include <stdio.h>
#include <string.h>

int main()
{
	int N, count = 0;
	/* store name and birthday in one string: "YYYY/MM/DD\0NAMES\0" */
	char cur[17], eldest[17] = {'9'}, youngest[17] = {'0'};

	scanf("%d", &N);
	for (int i = 0; i < N; i++) {
		scanf("%s %s", cur + 11, cur);
		if (strcmp(cur, "1814/09/06") >= 0 && strcmp(cur, "2014/09/06") <= 0) {
			if (strcmp(cur, eldest) <= 0)
				memcpy(eldest, cur, 17);
			if (strcmp(cur, youngest) >= 0)
				memcpy(youngest, cur, 17);
			count++;
		}
	}

	if (count)
		printf("%d %s %s", count, eldest + 11, youngest + 11);
	else
		printf("0");

	return 0;
}
